- 您现在的位置：买卖IC网 > PDF目录1809 > IR3622MTRPBF (International Rectifier)IC REG CTRLR BUCK PWM VM 32MLPQ PDF资料下载
参数资料
| 型号： | IR3622MTRPBF |
| 厂商： | International Rectifier |
| 文件页数： | 17/31页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM VM 32MLPQ |
| 标准包装： | 1 |
| PWM 型： | 电压模式 |
| 输出数： | 2 |
| 频率 - 最大： | 600kHz |
| 占空比： | 84% |
| 电源电压： | 7.5 V ~ 14.5 V |
| 降压： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 32-VFQFN 裸露焊盘 |
| 包装： | 标准包装 |
| 其它名称： | IR3622MTRPBFDKR |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页当前第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页
IR3622MPbF
Pre-Bias
The IR3622 is able to start up into pre-charged
output, which prevents oscillation and
disturbances of the output voltage.
The output starts in asynchronous fashion and
keeps the synchronous MOSFET off until the first
gate signal for control MOSFET is generated.
Figure below shows a typical Pre-Bias condition
at start up.
Depending on system configuration, specific
amount of output capacitance may be required to
prevent discharging the output voltage.
Operating Frequency Selection
The switching frequency is determined by
connecting an external resistor (Rt) to ground.
Figure 16 provides a graph of oscillator
frequency versus Rt. The maximum
recommended channel frequency is 600kHz.
700
600
500
400
V
Vo
300
Pre-Bias Voltage
200
(Output Voltage before startup)
100
Time
0
5
10
15
20
25
30
35
40
45
50
55
60
65
Over Voltage Protection
Over-voltage is sensed through two dedicated
sense pins V SEN1 , V SEN2 . A separate OVP circuit
is provided for each channel.
The OVP threshold is user programmable and
can be set by two external resistors. Upon over-
voltage condition of either one of the outputs, the
OVP forces a latched shutdown on the fault
output. In this mode, the upper FET driver turns
off and the lower FET drivers turn on, thus
crowbaring the output. Reset is performed by
recycling the Vcc or Enable.
Power Good
The IR3622 provides two separate open collector
power good signals which report the status of the
outputs. The outputs are sensed through the two
dedicated V SEN1 and V SEN2 pins.
Once the IR3622 is enabled and the outputs
reach the set value (90% of the Vout set point)
the power good signals go open and stay open
as long as the outputs stay within the set values.
These pins need to be externally pulled high.
Shutdown using Soft Start pins
The outputs can be shutdown by pulling the soft-
start pins below 0.3V. This can be easily done by
using an external small signal transistor. During
shutdown both MOSFET drivers will be turned
off. Normal operation will resume by cycling soft
start pin.
www.irf.com
Rt (Kohm)
Fig. 16: Switching Frequency vs. External Resistor (R t )
Frequency Synchronization
The IR3622 is capable of accepting an external
digital synchronization signal. Synchronization
will be enabled by the rising edge at an external
clock. Per –channel switching frequency is set
by external resistor (Rt). The free running
frequency oscillator frequency is twice the per-
channel frequency. During synchronization, Rt is
selected such that the free running frequency is
20% below the synchronization frequency.
Synchronization capability is provided for both
single output current share mode and dual
output configuration. The sync pin is noise
immune, when unused it should be left floating.
Thermal Shutdown
Temperature sensing is provided inside IR3622.
The trip threshold is typically set to 140 o C.
When trip threshold is exceeded, thermal
shutdown turns off both MOSFETs. Thermal
shutdown is not latched and automatic restart is
initiated when the sensed temperature drops to
the normal range. There is a 20 o C (typical)
hysteresis in the shutdown threshold.
17
相关PDF资料 |
PDF描述 |
|---|---|
| IR3623MTRPBF | IC REG CTRLR BUCK PWM VM 32MLPQ |
| IR3624MPBF | IC REG CTRLR BUCK PWM VM 10-MLPD |
| IR3628MPBF | IC CTLR PWM BUCK SYNC 12-MLPD |
| IR3629AMTRPBF | IC CTLR PWM SYNC BUCK 12-MLPD |
| IR3637ASTRPBF | IC REG CTRLR BUCK PWM VM 8-SOIC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| IR3623MPBF | 功能描述:IC REG CTRLR BUCK PWM VM 32MLPQ RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:4,000 系列:- PWM 型:电压模式 输出数:1 频率 - 最大:1.5MHz 占空比:66.7% 电源电压:4.75 V ~ 5.25 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 85°C 封装/外壳:40-VFQFN 裸露焊盘 包装:带卷 (TR) |
| IR3623MPBF_1 | 制造商:IRF 制造商全称:International Rectifier 功能描述:HIGH FREQUENCY 2-PHASE, SINGLE OR DUAL OUTPUT SYNCHRONOUS STEP DOWN CONTROLLER WITH OUTPUT TRACKING AND SEQUENCING |
| IR3623MTRPBF | 功能描述:开关变换器、稳压器与控制器 HI FREQ 2-PHASE Single or Dual SYNCH RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| IR3624MPBF | 功能描述:IC REG CTRLR BUCK PWM VM 10-MLPD RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:4,000 系列:- PWM 型:电压模式 输出数:1 频率 - 最大:1.5MHz 占空比:66.7% 电源电压:4.75 V ~ 5.25 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 85°C 封装/外壳:40-VFQFN 裸露焊盘 包装:带卷 (TR) |
| IR3624MTRPBF | 功能描述:开关变换器、稳压器与控制器 HI FREQ SYNC PWM 600kHz 5 or 12V 0.6 RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
发布紧急采购，3分钟左右您将得到回复。